Cita APA

Gabler, R. E., & Robert E. Gabler. (2007). IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc.

Chicago Style Citation

Gabler, Robert E., i Robert E. Gabler. IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc, 2007.

Cita MLA

Gabler, Robert E., i Robert E. Gabler. IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc, 2007.